Electric heater



1.-2. Electric heater

1.1 is a perspective view of an electric heater showing our new design according to a first embodiment;

1.2 is a front view thereof;

1.3 is a rear view thereof;

1.4 is a left view thereof;

1.5 is a right view thereof;

1.6 is a top view thereof;

1.7 is a bottom view thereof;

2.1 is a perspective view of an electric heater showing our new design according to a second embodiment;

2.2 is a front view thereof

2.3 is a rear view thereof;

2.4 is a left view thereof;

2.5 is a right view thereof;

2.6 is a top view thereof;

2.7 is a bottom view thereof.

The broken lines in the drawings are for the purpose of illustrating portions of the electric heater that form no part of the claimed design. 

CLAIM The ornamental design for an electric heater, as shown and described. 